Revenue brought in by the Windows and Windows Live division was $4.6 billion this past quarter ending March 31, which is a 4 percent increase from the same period last year. That number is also only $112 million less than the Windows sales during the fourth quarter of 2011, which is usually a strong quarter for PC purchases due to the holiday season.

However, the gain in Windows sales this last quarter was mainly due to a boost in Business purchases of PCs. Majority of Windows revenue is tied to PC sales since the machine must come with the software. Business sales rose 8 percent compared to the same quarter last year, while consumer sales of PCs and Windows remained flat.

News of the upcoming Windows 8 platform with its dramatically redesigned interface doesn't appear to have deterred businesses from purchasing more of the current Windows 7 machines. Windows 8 is expected to debut later this year with a new Metro-styled interface option optimized for touchscreens and tablets. For more details on the next-gen platform, make sure to check out news on the Consumer Preview.